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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Failure to optimize combined bitfield tests properly"
href="https://bugs.llvm.org/show_bug.cgi?id=45866">45866</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Failure to optimize combined bitfield tests properly
</td>
</tr>
<tr>
<th>Product</th>
<td>libraries
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
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<th>OS</th>
<td>Linux
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>enhancement
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>Support Libraries
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>gabravier@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>struct s
{
int a : 1;
int b : 1;
int c : 1;
};
bool f(s x)
{
return x.a && x.b && !x.c;
}
This can be converted to `(x & 7) == 3` (after conversion to `uint8_t`). GCC
does this transformation, but LLVM does not.</pre>
</div>
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